阅读说明：本技术 一种气体绝缘金属封闭开关 (Gas-insulated metal-enclosed switch ) 是由 王廷华 汤清双 吴小钊 尹俊强 张明勋 王小雨 杨镇宁 李猛 郑晓果 师军伟 刘 于 2019-11-13 设计创作，主要内容包括：本发明提供了一种气体绝缘金属封闭开关,其中包括密封壳体,密封壳体中固定设置有绝缘基座,绝缘基座上固定设置有静触头,静触头与母线连接,还包括动触头,动触头与静触头适配,密封壳体中还设置有热管和散热件,其中,热管的一端与绝缘基座相接,另一端与散热件相接,散热件有部分伸出密封壳体外且在伸出位置与密封壳体密封配合,热管吸收绝缘基座的热量并将其传递给散热件,并由散热件将热量散发到密封壳体外部；热管能够将绝缘基座的热量快速的传递至散热件上,并且,散热件有部分伸出密封壳体外,从而能够将热量散发至密封壳体外,从而能够加速绝缘基座的散热,也间接的降低了静触头的温度,避免了静触头的温度超标。(The invention provides a gas insulated metal closed switch, which comprises a sealed shell, wherein an insulating base is fixedly arranged in the sealed shell, a static contact is fixedly arranged on the insulating base and is connected with a bus, a moving contact is also included and is matched with the static contact, a heat pipe and a heat radiating piece are also arranged in the sealed shell, wherein one end of the heat pipe is connected with the insulating base, the other end of the heat pipe is connected with the heat radiating piece, part of the heat radiating piece extends out of the sealed shell and is in sealing fit with the sealed shell at the extending position, and the heat pipe absorbs the heat of the insulating base and transmits the heat to the heat radiating piece, and the heat is radiated to the outside of the sealed; the heat pipe can be with the quick transmission to the heat sink of the heat of insulating base to, the heat sink has the part to stretch out outside the sealed housing, thereby can give off the heat outside the sealed housing, thereby can accelerate insulating base's heat dissipation, also indirect reduction the temperature of static contact, avoided the temperature of static contact to exceed standard.)

1. A gas-insulated metal-enclosed switch, characterized by comprising:

sealing the housing;

the insulating base is fixed in the sealed shell;

the static contact is fixedly connected to the insulating base and is connected with a bus;

the moving contact is matched with the static contact and moves relative to the static contact to realize the opening and closing of the switch;

a heat pipe located in the sealed housing;

a heat sink located in the sealed housing;

one end of the heat pipe is connected with the insulating base, the other end of the heat pipe is connected with the heat dissipation piece, part of the heat dissipation piece extends out of the sealing shell and is in sealing fit with the sealing shell at the extending position, and the heat pipe absorbs heat of the insulating base and transmits the heat to the heat dissipation piece, and the heat is dissipated to the outside of the sealing shell by the heat dissipation piece.

2. A gas insulated metal enclosed switch according to claim 1, wherein said heat sink is a plate type heat sink.

3. A gas insulated metal enclosed switch according to claim 2, wherein the plate radiator element comprises a plate section arranged parallel to the housing wall, at least part of the plate section extending through the housing wall and being exposed, the plate section being in sealing engagement with the housing wall.

4. The gas insulated metal enclosed switch of claim 3, wherein the plate section is provided with a boss structure, and the housing wall is provided with a through hole for the boss to extend to be exposed outside the sealed housing.

5. A gas insulated metal enclosed switch according to claim 3, wherein said plate radiator element comprises a first plate section and a second plate section perpendicular to each other, the second plate section being parallel to the housing wall, and the heat pipe being parallel to and inserted into the first plate section.

6. The gas-insulated metal enclosed switch of claim 5, wherein the end of the first plate section is connected to the insulating base and encloses the heat pipe together with the insulating base.

7. The gas-insulated metal enclosed switch according to any one of claims 1 to 6, wherein the heat pipe is embedded in the insulating base.

8. A gas insulated metal enclosed switch according to any of claims 1 to 6, characterized in that the outer side of the stationary contact is provided with heat dissipating fins.

9. The gas insulated metal enclosed switch according to any one of claims 1 to 6, wherein said two heat pipes are provided, and said two heat pipes are spaced apart.

10. The gas insulated metal enclosed switch according to any one of claims 1 to 6, wherein said stationary contact is integrally molded with said insulating base by casting.

Technical Field

The invention relates to a gas insulated metal-enclosed switch.

Background

A box-type gas-insulated metal-enclosed switchgear (C-GIS) is a novel switchgear used for a 10-35kv or higher voltage power transmission and distribution system to receive or distribute electric energy and can perform functions of control, protection, measurement, monitoring, communication and the like on the normal operation and fault conditions of an electric power system, and the C-GIS is one of the GIS.

The C-GIS metal enclosed switchgear is widely applied to power distribution of an electric power system and construction of a high-speed rail power distribution station in the medium-voltage field due to the advantages of small size, compact size and the like. However, the primary conductive main loop of the C-GIS metal closed switch equipment is sealed in a closed air chamber, the heat of the main conductive loop cannot exchange heat with the outside air well, and the inside of the C-GIS metal closed switch equipment is closed, so that airflow hardly flows; because the internal space is small, all elements need to be insulated, and the heat dissipation of the box type gas insulated metal enclosed switchgear is a great technical problem.

When the current rises to 2500A or higher, the conductive loop generates heat to rapidly raise the temperature in the air chamber, so that the temperature rise is easy to exceed the standard, and particularly, the isolating switch part with large current is easy to exceed the standard. The appearance of an isolating switch static contact for a traditional C-GIS metal enclosed switchgear is cylindrical, the static contact is fixed on an insulating base, heat of the static contact is dissipated only by a contact body and the insulating base body, the conducting capacity of the insulating base is extremely poor, the internal temperature of an insulating layer is very high, the temperature rise of a contact is very easy to exceed the standard, and the problem of cooling the C-GIS metal enclosed switchgear is urgently solved in the industry.

Disclosure of Invention

The invention aims to provide a gas insulated metal-enclosed switch, which aims to solve the problems of poor heat dissipation of an insulating base and overproof temperature rise of a static contact of an isolating switch in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a gas-insulated metal-enclosed switch comprising:

sealing the housing;

the insulating base is fixed in the sealed shell;

the static contact is fixedly connected to the insulating base and is connected with a bus;

the moving contact is matched with the static contact and moves relative to the static contact to realize the opening and closing of the switch;

a heat pipe located in the sealed housing;

a heat sink located in the sealed housing;

one end of the heat pipe is connected with the insulating base, the other end of the heat pipe is connected with the heat dissipation piece, part of the heat dissipation piece extends out of the sealing shell and is in sealing fit with the sealing shell at the extending position, and the heat pipe absorbs heat of the insulating base and transmits the heat to the heat dissipation piece, and the heat is dissipated to the outside of the sealing shell by the heat dissipation piece.

The invention has the beneficial effects that: the heat pipe can be with the quick transmission to the heat sink of the heat of insulating base to, the heat sink has the part to stretch out outside the sealed housing, thereby can give off the heat outside the sealed housing, thereby can accelerate insulating base's heat dissipation, also reduced the temperature of static contact, avoided the temperature of static contact to exceed standard.

Further, the heat dissipation member is a plate-type heat dissipation member.

Has the advantages that: the plate-type heat sink is simpler in structural arrangement.

Further, the plate-type heat sink includes a plate section disposed parallel to the casing wall, at least a portion of the plate section penetrates the casing wall and is exposed to the outside, and the plate section is in sealing engagement with the casing wall.

Has the advantages that: the plate section of the plate type heat dissipation piece is arranged in parallel with the shell, at least part of the plate section penetrates through the shell wall and is exposed outside, and the space occupied by the plate section of the plate type heat dissipation piece outside the sealed shell is reduced.

Furthermore, a boss structure is arranged on the plate section, and a through hole for the boss to extend out and expose outside the sealed shell is arranged on the shell wall.

Has the advantages that: on the one hand, the positioning between the plate-type heat dissipation piece and the shell wall can be facilitated, and on the other hand, the sealing between the plate section and the shell wall can be facilitated.

The plate-type heat dissipation member comprises a first plate section and a second plate section which are perpendicular to each other, the second plate section is parallel to the shell wall, and the heat pipe is parallel to the first plate section and inserted into the first plate section.

Has the advantages that: the heat pipe is parallel to the first plate section and is inserted into the first plate section, so that the depth of the heat pipe inserted into the first plate section can be increased, the contact area between the heat pipe and the first plate section is increased, and the heat conduction efficiency between the heat pipe and the first plate section is increased.

Furthermore, the end of the first plate section is connected with the insulating base and wraps the heat pipe together with the insulating base.

Has the advantages that: the heat on the heat pipe is transferred to the outside of the sealed shell through the plate-type heat dissipation piece, and the temperature of the air chamber is prevented from being increased due to the heat exchange between the heat pipe and the gas in the sealed shell.

The heat pipe is embedded in the insulating base.

Has the advantages that: the connection stability of the heat pipe and the insulating base is improved, the outer wall of the heat pipe is tightly attached to the insulating base, and therefore a good heat conduction effect between the heat pipe and the insulating base is guaranteed.

And the outer side surface of the static contact is provided with a radiating fin.

Has the advantages that: the contact area between the static contact and the gas in the gas chamber is increased, and the heat dissipation efficiency of the static contact is improved.

The heat pipe is provided with two, and two heat pipes are arranged at intervals.

Has the advantages that: the heat radiating piece and the heat pipe are convenient to assemble while heat transfer is met.

And the static contact and the insulating base are integrally cast and molded.

Has the advantages that: the heat of the static contact can be directly transferred to the insulating base, and the smooth heat transfer between the static contact and the insulating base is ensured.

Drawings

Fig. 1 is a schematic perspective view showing a structure of a moving contact and a stationary contact in an embodiment of a gas insulated metal-enclosed switch according to the present invention;

FIG. 2 is a top view of the structure shown in FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is a view in the direction C of the structure shown in FIG. 1;

fig. 5 is a schematic structural diagram showing the installation of the moving and stationary contacts in the sealed housing according to the embodiment of the gas-insulated metal-enclosed switch of the present invention.

In the figure: 1-moving contact; 2-conductive contact fingers; 3, static contact; 4-copper bar; 5-an insulating base; 6-a heat pipe; 7-plate heat sink; 8-a first plate section; 9-boss; 10-a second plate section; 100-sealing the housing.

Detailed Description

Embodiments of the gas-insulated metal-enclosed switch of the present invention will be further described with reference to the accompanying drawings.

The invention is described by taking a gas insulated metal enclosed switch used in a C-GIS as an example, and in other embodiments, the gas insulated metal enclosed switch can also be used in a main bus three-phase common-tube GIS, a full three-phase common-tube GIS or a compound or mixed GIS.

As shown in fig. 1 to 5, the gas insulated metal enclosed switch includes a sealed housing 100, and an isolating switch is disposed in the sealed housing 100, in this embodiment, the isolating switch includes a static contact 3 and a moving contact 1 inserted and adapted to the static contact 3, the static contact 3 is fixed in the sealed housing through an insulating base 5, specifically, a connecting flange is disposed at a lower end of the insulating base 5, and the insulating base 5 is fixedly connected to the sealed housing through the connecting flange. The insulating base 5 is made of epoxy resin, the static contact 3 is made of copper, and the static contact 3 and the insulating base 5 are integrally molded by casting. The static contact 3 has the grafting chamber of opening towards moving contact 1, and V-arrangement touches and indicates the groove in the internal surface of grafting chamber has been seted up, installs electrically conductive finger 2 in the V-arrangement finger groove, and moving contact 1 is cylindricly, thereby moving contact 1 for static contact 3 remove with electrically conductive finger 2 sliding electrical contact in the static contact 3, can realize isolator's break-make. The static contact 3 is in conductive connection with a bus in the C-GIS sealed shell through a conductive copper bar 4, and when the moving contact 1 is in plug fit with the static contact 3, the moving contact 1, the static contact 3, the conductive copper bar 4 and the bus form a conductive path.

The outer peripheral surface of the static contact 3 is a cylindrical surface, and in order to facilitate the dissipation of heat of the static contact 3, a heat dissipation ring groove is formed in the cylindrical surface of the static contact 3, so that the heat dissipation area of the static contact 3 is increased, and the heat dissipation efficiency of the static contact 3 is improved.

In order to accelerate the heat dissipation of the static contact 3, the heat pipe 6 is embedded in the insulating base 5, the heat pipe 6 and the insulating base 5 are integrally molded by casting, the plate-type heat dissipation member 7 is inserted into the other end of the heat pipe 6, and the plate-type heat dissipation member 7 is made of aluminum and has good heat conduction performance; specifically, the plate-type heat sink 7 includes a first plate segment 8 and a second plate segment 10 that are perpendicular to each other, wherein, an insertion hole for inserting the heat pipe 6, which is open toward the heat pipe 6, is opened at one end of the first plate segment 8 that faces toward the heat pipe 6, the second plate segment 10 is parallel to the casing wall and perpendicular to the heat pipe 6, and a boss 9 protruding from the plate surface is provided at one side of the second plate segment 10 that is away from the heat pipe 6, after the plate-type heat sink 7 and the casing wall are mounted, the boss 9 penetrates through the through-mounting hole of the casing wall, and the side of the boss 9 that is away from the heat pipe 6 extends out of the casing wall and is exposed outside the sealed casing, so that heat exchange between the plate-type heat sink 7 and air outside. In order to avoid the boss 9 occupying the space outside the sealed housing after being installed, the side of the boss 9 of the second plate section 10 away from the heat pipe 6 is flush with the outer wall surface of the housing wall. And the boss 9 is matched with the hole edge of the through-mounting hole in a sealing way. In order to avoid the heat pipe 6 from contacting the gas in the sealed housing and affecting the heat conduction, the end face of the first plate section 8 facing the heat pipe 6 is arranged in close contact with the flange side of the insulating base 5, so that the end of the first plate section 8 is in contact with the insulating base 5 and encloses the heat pipe 6 together with the insulating base 5.

In order to increase the stability of the plate-type heat sink 7, a fixing hole is formed in the first plate section 8, the axis of the fixing hole extends in the plate thickness direction, and the plate-type heat sink 7 is fixedly connected with the sealed shell through the fixing hole. In this embodiment, the heat pipes 6 are provided with two, and the two heat pipes 6 are arranged at intervals along the width direction of the first plate section 8, so that when heat on the insulating base 5 is transferred to the plate-type heat dissipation member 7, the alignment between the insertion holes and the heat pipes 6 can be conveniently realized when the insertion holes of the first plate section 8 of the plate-type heat dissipation member are inserted into the heat pipes due to the small number of the heat pipes 6, and therefore the assembly between the plate-type heat dissipation member 7 and the heat pipes 6 can be conveniently realized.

When the plate-type heat dissipation member 7 is installed, the insulation base 5 is fixed to the sealed shell, then the first plate section 8 of the plate-type heat dissipation member 7 is in plug-in fit with the heat pipe 6 on the insulation base 5, the boss 9 on the second plate section 10 of the plate-type heat dissipation member 7 penetrates through the through-mounting hole in the shell wall, then the plate-type heat dissipation member 7 is fixed to the sealed shell by penetrating through the fixing hole of the plate-type heat dissipation member 7 through a screw, and finally the boss 9 of the first plate section 8 is sealed with the shell wall.

When the moving contact 1 is inserted into the static contact 3, the temperature of the contact position is higher, so that the temperature of the static contact 3 is also higher, the heat generated by the static contact 3 is transferred to the insulating base 5, the insulating base 5 transfers the heat to the heat pipe 3, the heat conductivity coefficient of the heat pipe 3 is 3000-8000, the heat conductivity coefficient is more than 10 times that of copper, so that the heat can be quickly transferred to the plate-type heat dissipation member 7, the heat is exchanged with the air outside the sealed shell through the boss 9 of the plate-type heat dissipation member 7, and the heat dissipation capacity of the heat dissipation member is 2-3 times that of a common isolating switch contact. On the other hand, the outer surface of the static contact 3 is provided with the heat dissipation ring groove, so that the heat dissipation area of the static contact 3 is increased, the heat dissipation efficiency of the static contact 3 is improved, and the surface temperature of the static contact 3 of the isolating switch is reduced.

In this embodiment, the heat dissipation member is a plate-type heat dissipation member, in other embodiments, the heat dissipation member may further be a heat dissipation structure with heat dissipation fins, the heat dissipation fins are circumferentially fixed to the hollow pipe column at this time, the hollow pipe column is arranged at an opening toward one end of the heat pipe, so that a hollow pipe section of the heat dissipation structure can be inserted into one end of the heat pipe, the hollow pipe section extends out of the shell wall and is in sealed fit with the shell wall, and the heat dissipation fins on the hollow pipe section are located outside the sealed shell and used for dissipating heat.

In this embodiment, plate heat sink includes the board section with conch wall parallel arrangement, the side of keeping away from the heat pipe of board section is equipped with the boss of protrusion in the face, the boss passes the through-mounting hole on the conch wall, the hole edge in through-mounting hole is along with boss seal fit, in other embodiments, plate heat sink also can not set up the board section parallel with the conch wall, at this moment, plate heat sink is straight board section, straight board section one end meets with the heat pipe, the other end of straight board section passes through the through-mounting hole on the conch wall, the hole edge in through-mounting hole is along with the outer peripheral face seal fit of the position that stretches out of straight board section, at this moment, the terminal surface of the one end that stretches out the conch wall of.

In this embodiment, be equipped with boss structure on the board section, be equipped with on the conch wall and supply the boss to stretch out and expose the via hole outside sealed housing, in other embodiments, can also not set up boss structure on the board section, be equipped with on the conch wall this moment and supply the board section to stretch out and expose the via hole outside sealed housing.

In this embodiment, the plate-type heat sink includes a first plate section and a second plate section perpendicular to each other, the second plate section is parallel to the casing wall, the heat pipe is parallel to the first plate section and is inserted into the first plate section, in other embodiments, the plate-type heat sink may also be only a plate section arranged parallel to the casing wall, at this time, the annular table of the insulating base extends towards one side of the heat sink plate section to be closely attached to the heat sink plate section, at this time, one end of the heat pipe extends into the insulating base, and the other end extends into the heat sink plate section; or, the plate-type heat sink may be only a plate segment arranged parallel to the wall of the casing, at this time, the length of the heat pipe is long, one end of the heat pipe extends into the insulating base, the other end of the heat pipe extends into the heat sink segment, and at this time, the heat pipe at the insulating base and the heat sink segment is exposed in the sealed casing.

In the embodiment, one end of the heat pipe extends into the insulating base, and the other end of the heat pipe extends into the plate-type heat radiating piece; or one side of the plate-type heat dissipation part facing the heat pipe is provided with a groove for installing the heat supply pipe, and one end of the heat pipe extends into the insulation base.

In this embodiment, the one end of the orientation insulating base of heat pipe and the integrative casting shaping of insulating base, the one end of keeping away from insulating base of heat pipe and the cooperation of pegging graft of board-like radiating piece, opening orientation insulating base has been seted up to board-like radiating piece's one end towards insulating base, a spliced eye for holding the heat pipe, in other embodiments, heating pipe male spliced eye is seted up to one side towards the heat pipe to insulating base, the opening orientation heat pipe has been seted up to board-like radiating piece's one end, a spliced eye for holding the heat pipe, this moment, the one end and the insulating base cooperation of pegging graft of heat pipe, the other end and the board-like radiating piece cooperation.

In this embodiment, the end of the first plate segment is connected to the insulating base and wraps the heat pipe together with the insulating base; in other embodiments, the end of the plate-type heat sink facing the insulating base is spaced apart from the insulating base, and at this time, one end of the heat pipe extends into the insulating base, and the other end of the heat pipe extends into the plate-type heat sink, and at this time, the heat pipe located between the insulating base and the plate-type heat sink is exposed in the sealed housing.

In this embodiment, the outer side surface of the static contact is provided with the heat dissipation fins, and in other embodiments, the heat dissipation fins may not be provided.

In this embodiment, the heat dissipation ring groove constitutes a heat dissipation fin, and in other embodiments, the heat dissipation fin may also be a groove extending in the axial direction of the stationary contact.

In this embodiment, the number of the heat pipes is two, and the two heat pipes are arranged at intervals, and in other embodiments, one, three, four, five, six, and the like may be arranged on each heat pipe.

In this embodiment, the static contact and the insulating base are integrally cast, and in other embodiments, the static contact may not be integrally cast with the insulating base, and at this time, the connecting member is embedded in the insulating base, and the insulating base is relatively fixed to the insulating base by being fixedly connected to the insulating member.

In this embodiment, the side of the boss of the second plate section, which is away from the heat pipe, is flush with the outer wall surface of the casing wall.

In this embodiment, the side of the boss of the second plate section, which is far away from the heat pipe, is flush with the outer wall surface of the casing wall, and in other embodiments, the side of the boss of the second plate section, which is far away from the heat pipe, extends out of the casing wall of the sealed casing, so that the boss of the second plate section extends into another unsealed casing of the sealed casing, and is not limited to extending out.